Neon Guppy

Kind of cool are the Neon-guppies, a tiny little colorful fish that is actively pulling streams of magic into them, making them shine in all the colors of the rainbow and even more. Some scientists of the Academia Baradolia have realized their enormous magical potential as a swarm, where they are even able to chase away predetors, if they are magically loaded up enough.

But if they do not encounter any predeators or perceived dangers, it happens frequently that they just burst from magic overload - if that happens at night, you have suddenly a swarm of tiny little magical fishes plopping up in a magical firework under water